Trigger Positions, Slope, Source, And Mode Settings A - Tektronix 222PS Operator's Manual

Appendix B: Remote Communication
Trigger Positions, Slope, Source, and Mode Settings
Characters 7 and 8 of the front panel setup string define several of the
trigger settings of the instrument. Two bit values of the characters are
used to define the Trigger SOURCE setting (bit 4 of character 7 and bit
1 of character 8). Therefore, both characters must be set correctly to
control the Trigger SOURCE setting. See Table A 5 for detailed infor
mation.
In our example front panel setup string, characters 7 and 8 are 2 and 1
respectively. The binary bits are 0010 and 0001 for these two charac
ters. The first two bits of character 7 define the TRIG POS setting; the
bit values of 0 0 in these positions decode to a TRIG POS of POST.
The third bit is a 1 and decodes to a + SLOPE setting.
The last bit of character 7 and the first bit of character 8 are 0 and 0
respectively and decode to VERT Trigger SOURCE. The last three bits
of character 8 are 001 and decode to AUTO LVL Trigger MODE.
A 24
Appendices